Java项目:学生选课系统(java+javaweb+jdbc)

源码获取：博客首页 "资源" 里下载！

功能介绍：

用户菜单、学生管理、教师管理、课程管理、成绩排名查询

学生管理控制层：

@Controller
@RequestMapping("/student")
public class StudentController {private static final String LIST = "student/list";@Autowiredprivate StudentService studentService;@Autowiredprivate SubjectService subjectService;@Autowiredprivate ClazzService clazzService;//跳转添加页面@GetMapping("/add")public String add(ModelMap modelMap) {//查询所有的专业，存储到request域List<Subject> subjects = subjectService.query(null);modelMap.addAttribute("subjects", subjects);return "student/add";}/*** 学生添加操作* @param student* @return*/@PostMapping("/add")@ResponseBodypublic Map<String, Object> add(@RequestBody Student student) {if(StringUtils.isEmpty(student.getStuName())){return MapControl.getInstance().error("请填写姓名").getMap();}if(StringUtils.isEmpty(student.getJoinDate())){return MapControl.getInstance().error("请填写入学时间").getMap();}if(StringUtils.isEmpty(student.getStuPwd())){return MapControl.getInstance().error("请填写密码").getMap();}if(StringUtils.isEmpty(student.getCardNo())){return MapControl.getInstance().error("请填写身份证号").getMap();}if(StringUtils.isEmpty(student.getPhone())){return MapControl.getInstance().error("请填写手机号码").getMap();}Integer maxId = studentService.maxId();if(maxId==null){maxId=0;}student.setStuNo(StringUtil.randomNumber("",maxId));//设置学生的状态student.setStatus(Student.StatusType.type_1);int result = studentService.create(student);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}//根据id查询@PostMapping("/delete/{id}")@ResponseBodypublic Map<String, Object> delete(@PathVariable("id") Integer id) {int result = studentService.delete(id);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}//删除操作@PostMapping("/delete")@ResponseBodypublic Map<String, Object> delete(String ids) {int result = studentService.delete(ids);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}/*** 学生修改操作* @param student* @return*/@PostMapping("/edit")@ResponseBodypublic Map<String, Object> edit(@RequestBody Student student) {if(StringUtils.isEmpty(student.getStuName())){return MapControl.getInstance().error("请填写姓名").getMap();}if(StringUtils.isEmpty(student.getJoinDate())){return MapControl.getInstance().error("请填写入学时间").getMap();}if(StringUtils.isEmpty(student.getCardNo())){return MapControl.getInstance().error("请填写身份证号").getMap();}if(StringUtils.isEmpty(student.getPhone())){return MapControl.getInstance().error("请填写手机号码").getMap();}int result = studentService.saveU(student);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}//根据id查询，跳转修改页面@GetMapping("/edit/{id}")public String detail(@PathVariable("id") Integer id, ModelMap modelMap) {//查询出要修改的学生的信息Student student = studentService.detail(id);//查询所有的专业List<Subject> subjects = subjectService.query(null);//将查询出来的数据存储到request域，实现表单回显modelMap.addAttribute("student", student);modelMap.addAttribute("subjects", subjects);return "student/edit";}//查询所有@PostMapping("/query")@ResponseBodypublic Map<String, Object> query(@RequestBody Student student) {//查询所有的学生信息List<Student> list = studentService.query(student);//查询所有的专业List<Subject> subjects = subjectService.query(null);//查询所有的班级List<Clazz> clazzes = clazzService.query(null);//设置关联list.forEach(entity -> {subjects.forEach(subject -> {//判断学生表中的subjectId和专业表的id是否一致if (subject.getId() == entity.getSubjectId()) {entity.setSubject(subject);}});clazzes.forEach(clazz -> {//判断学生表中的clazzId和班级表的id是否一致if (clazz.getId() == entity.getClazzId()) {entity.setClazz(clazz);}});});//查询总记录条数Integer count = studentService.count(student);return MapControl.getInstance().success().page(list, count).getMap();}//跳转列表页面@GetMapping("/list")public String list() {return "student/list";}//跳转查询学生页面@GetMapping("/teacher_student")public String teacher_student(ModelMap modelMap, HttpSession session) {//查询所有的专业List<Subject> subjects = subjectService.query(null);//查询所有的班级List<Clazz> clazzes = clazzService.query(null);Teacher teacher = (Teacher) session.getAttribute("user");modelMap.addAttribute("subjects", subjects);modelMap.addAttribute("clazzes", clazzes);modelMap.addAttribute("teacher", teacher);return "student/teacher_student";}//老师查询学生@PostMapping("/teacher_student")@ResponseBodypublic Map<String, Object> teacher_student(Integer clazzId, Integer subjectId, ModelMap modelMap, HttpSession session) {Teacher teacher = (Teacher) session.getAttribute("user");List<Student> students = studentService.queryStudentByTeacher(teacher.getId(), clazzId, subjectId);List<Subject> subjects = subjectService.query(null);List<Clazz> clazzes = clazzService.query(null);//设置关联students.forEach(entity -> {subjects.forEach(subject -> {//判断学生表的subjectId和专业表的id是否一致if (subject.getId() == entity.getSubjectId()) {entity.setSubject(subject);}});clazzes.forEach(clazz -> {//判断学生表的clazzId和班级表的id是否一致if (clazz.getId() == entity.getClazzId()) {entity.setClazz(clazz);}});});return MapControl.getInstance().success().add("data", students).getMap();}
}

用户管理操作：

/*** 用户管理操作*/
@Controller
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;/*** 用户添加页面* @return*/@GetMapping("/add")public String create() {return "user/add";}/*** 用户添加操作* @param user* @return*/@PostMapping("/add")@ResponseBodypublic Map<String, Object> add(@RequestBody User user) {if(StringUtils.isEmpty(user.getUserName())){return MapControl.getInstance().error("请填写用户名").getMap();}if(StringUtils.isEmpty(user.getName())){return MapControl.getInstance().error("请填写名称").getMap();}if(StringUtils.isEmpty(user.getUserPwd())){return MapControl.getInstance().error("请填写密码").getMap();}int result = userService.create(user);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}/*** 根据id删除* @param id* @return*/@PostMapping("/delete/{id}")@ResponseBodypublic Map<String, Object> delete(@PathVariable("id") Integer id) {int result = userService.delete(id);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}//批量删除@PostMapping("/delete")@ResponseBodypublic Map<String, Object> delete(String ids) {int result = userService.delete(ids);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}/*** 编辑用户信息操作* @param user* @return*/@PostMapping("/edit")@ResponseBodypublic Map<String, Object> edit(@RequestBody User user) {if(StringUtils.isEmpty(user.getUserName())){return MapControl.getInstance().error("请填写用户名").getMap();}if(StringUtils.isEmpty(user.getName())){return MapControl.getInstance().error("请填写名称").getMap();}if(StringUtils.isEmpty(user.getUserPwd())){return MapControl.getInstance().error("请填写密码").getMap();}int result = userService.update(user);if (result <= 0) {return MapControl.getInstance().error().getMap();}return MapControl.getInstance().success().getMap();}/*** 根据id查询，跳转修改页面* @param id* @param modelMap* @return*/@GetMapping("/edit/{id}")public String edit(@PathVariable("id") Integer id, ModelMap modelMap) {User user = userService.detail(id);modelMap.addAttribute("user", user);return "user/edit";}//查询所有@PostMapping("/query")@ResponseBodypublic Map<String, Object> query(@RequestBody User user) {List<User> list = userService.query(user);Integer count = userService.count(user);return MapControl.getInstance().success().page(list, count).getMap();}//跳转列表页面@GetMapping("/list")public String list() {return "user/list";}}

登录控制层：

@Controller
public class LoginController {@Autowiredprivate UserService userService;@Autowiredprivate TeacherService teacherService;@Autowiredprivate StudentService studentService;//跳转登录页面@GetMapping("/login")public String login() {return "login";}//登录操作@PostMapping("/login")@ResponseBodypublic Map<String, Object> login(String userName, String password, String captcha, String type, HttpSession session) {//判断用户名、密码、用户类型、验证码是否为空if (StringUtils.isEmpty(userName) || StringUtils.isEmpty(password) || StringUtils.isEmpty(captcha) || StringUtils.isEmpty(type)) {return MapControl.getInstance().error("用户名或密码不能为空").getMap();}//获取系统生成的验证码String _captcha = (String) session.getAttribute("captcha");//先判断验证码是否正确if (!(captcha.toLowerCase()).equals(_captcha.toLowerCase())) {//验证码错误return MapControl.getInstance().error("验证码错误").getMap();}//判断用户类型if ("1".equals(type)) { //管理员验证登录User user = userService.login(userName, MD5Utils.getMD5(password)); //对密码进行加密处理，因为数据库中存储的是加密后的密码if (user != null) {session.setAttribute("user", user);session.setAttribute("type", 1);return MapControl.getInstance().success().add("data", user).getMap();} else {return MapControl.getInstance().error("用户名或密码错误").getMap();}}if ("2".equals(type)) { //老师验证登录Teacher teacher = teacherService.login(userName, MD5Utils.getMD5(password));if (teacher != null) {session.setAttribute("user", teacher);session.setAttribute("type", "2");return MapControl.getInstance().success().add("data", teacher).getMap();} else {return MapControl.getInstance().error("用户名或密码错误").getMap();}}if ("3".equals(type)) { //学生验证登录Student student = studentService.login(userName, MD5Utils.getMD5(password));if (student != null) {session.setAttribute("user", student);session.setAttribute("type", "3");return MapControl.getInstance().success().add("data", student).getMap();} else {return MapControl.getInstance().error("用户名或密码错误").getMap();}}return MapControl.getInstance().getMap();}}

源码获取：博客首页 "资源" 里下载！